Dual reversible right and left hand wrench



E. A. PACK DUAL REVERSIBLE RIGHT AND LEFT HAND WRENCH Filed Sept. 22, 1937 Patented Dec. 26, 1939 PA'rssr orrice DUAL REVERSIBLE RIGHT AND'LEFT HAND WRENCH Earle A. Pack,

Caldwell, Tdaho Application September 22, 1937, Serial No. 165,095

' 1 Claim.

My invention relates to wrenches and particularly to a wrench that may be used for placing and/or removing two nuts at one time upon the same bolt where one of the nuts is a right hand threaded nut and the other one of the nuts is a left hand threaded nut and where the bolt has a dual thread, one being right hand and the other being left hand, disposed thereupon.

The invention is comprised of a frame made up of flat material and assembled in laminated form and secured together by suitable rivet fastenings. Heads for engaging the nuts are disposed within the frame and are revolvable in either direction therein and a feeding double jawed pawl is disposed within the frame. The pawl has two jaws, one adapted for rotatingthe nut clockwise, the other for rotating the nut counter-clockwise, and a pair of heads forengaging thenut and a pair of feeding pawls adapted for being placed in registry with each of the heads. A fixed shaft is associated with each of the pawls which said shaft operates in an arcuate slot disposed in the outside one of. the frame members and a locking pin therein that upon a bolt'by the movement of the wrench in the customary manner.

A further object ofmy invention is to provide a wrench that may be utilized in the removal or the tightening of a single nut upon a bolt in which both right and left hand nuts are disposed. And a further object of my invention is to provide a wrench that may be utilized for the threading or unthreading of nuts from bolts.

With these and incidental objects in view, the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claim, and a preferred form of embodi- 50 ment of which is hereinafter shown with reference to the drawing which accompanies and forms a part of this specification.

In the drawing: Fig. 1 is a plan view of the wrench.

55 Fig. 2 is a side view of the wrench. In this View the frame is partially broken away to illustrate the internal construction of the wrench.

Fig. 3 is a side view of one of the heads shown removed from the wrench.

Fig. dis a plan view of the vhead illustrated in 5 Fig. 3.

Fig. 5 is a partially sectional plan View of the wrench frame. In this View one of the heads is shown in plan view with the feeding pawl shown in neutral position relative to the head. The 10 pawl is shown in dotted position and as being engaged with the notched periphery of one of the heads. In this view a nut is also shown in dotted position and as being engaged by the head.

Fig. 6 is a plan view of the outside laminae of is the frame.

Fig. '7 is a perspective plan view of one of the ratchet pawls.

Like reference characters refer to like parts throughout the several views. I preferably form my wrench of a plurality of like laminated frame members i and 2 which form the front and back walls of the wrench when the same is assembled. The next two succeeding frame members are in pairs as illustrated at 3 25 and 4 forming one of the pairs that are disposed adjacent to the side 2 and 5 and 6 which are sim ilar to 3 and 4 that are disposed adjacent to the plate I. The adjacent laminae 1 and 8 engage the side walls of the laminae 4 and 6 but the 30 laminae l and 8 are similar to the outside walls I and 2 and the central one of the lamina 23 forms the medial line of the wrench and separates the laminae I and 8 and also separates the heads 9 and Hi. The thickness of the plate 23 is im- 35 portant and controlling because it predetermines the spacing apart of the respective heads 9 and ID that are to engage the nut. Each of the heads 9 and I 9 are shaped to engage the nut to be turned upon their inner periphery at H to adapt the same for engaging square nuts or hexagonal nuts.

Hubs l2 and I3 are formed integral with each of the heads 9 and I0 and outwardly extend from the opposite sides of the head and the shoulders formed by the hubs l2 and I3 precisely engage respectively the plates l and 1, 2 and 8 and hold the heads in precise position and alignment. The plates I and I, 2 and 8 are bored as illustrated at |3A to permit a precise fitting of the respective 5 heads 9 and II] to the plates I, I, 2 and 8 respectively.

The journal pin l4 passes through all of the plates l, 2, 3, 4, 5, 6, I, 8 and 23. A pair of feeding pawls l6 and I6A are journaled about the journal pin 14 and a bearing sleeve I5 is disposed Within each of the ratchet pawls l6 and [6A. Each of the ratchet pawls has jaw points I! and I8 that are adapted for being placed into registry with and out of registry with notches l9 disposed upon the outer surface of each of the heads 9 and Ill. Each of the ratchet pawls I6 and IEA has a manually manipulative pin 20 and 22 formed integral therewith and each of the outside of the walls of the frame has an arcuate slot 2| disposed therein in which the pin 20 moves.

The journal pin I4 is secured and held in place preferably by riveting over its outer ends, as illustrated at 24 and 25 to form a tight working relationship between the pin and the frame and to also secure the frame members together; Additional fastening rivets here shown as two in number, at 26 and 21 pass through the respective frame members and are also riveted over upon their outer ends to further secure the laminae forming the frame together. The opposite ends 28 and 29 are rounded to form segments of circles. A locator pin 30 that is hollow on its base end is disposed within the frame and in registry alignment with the respective feeding pawls. The pin 30 is hollow for the major portion of its length as illustrated at 3i and. a spring 32 normally maintains the pin urged toward the feeding pawl. A'n indent 33-is disposed within the respective ends of each of the ratchet pawls and into which the end of the pin 30 is made to engage and to locate the same, the purpose being to place the feeding pawl in neutral with the points I? and I8 out of registry and out of engagement with the respective notches I9 disposed upon the periphery of the heads 9 and [0. The outer surfaces 34 and 35 are formed from segments of circles and when the pin 30 is out of registry with the indent 33 the spring 32 forces the feeding ratchet to rotate about the pin M and to cause one of the points I! or I8, depending upon its position to engage within the teeth I9. It will be noted that one of the heads 9 may be rotated in one direction by the movement of the handle of the frame and the opposite head It] may be moved in the opposite direction when the handle is moved in the opposite direction. The two may be placed so that a double nut similarly threaded may be tightened simultaneously. The wrench may be used to turn either right or left hand threaded nuts simultaneously with but one alternate movement of the wrench or that either one of the same may be tightened or loosened without interfer-" ing with the other, thus forming a wrench that may be used for a number of purposes.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention, to

the embodiment herein shown and described, as

' it is susceptible of embodiment in various forms,

all coming within the scope of the claim which follows.

What I claim is: In a device of the class described, the combination of a frame, said frame being formed of a plurality of plates of like thickness, a pair of heads having ratchet teeth disposed on their outer rim mounted in opposite sides of the frame and journaled within bearings formed in certain of said plates, with the plates in which the heads are journaled being longer than the other of the said plates, a feeding pawl having two points for engagement with the teeth disposed onthe rim of the head and each being positioned to rotate the head in but one direction when placed in registry with each of the heads and one of said pawls being normally out of contact engagement with one of the heads and said pawls being hingedly supported about a common hinge pin,

with the said hinge pin being supported in the of the frame has reciprocating movement imparted thereto. i

' EARLE A. PACK. 

